Leather-staking machine.



N0 MODEL.

PATEN'iED MAY 26, 1903. E. PRINTZ.

LEATHER STAKIN-G MACHINE;

v APPLICATION FILED SEPT. 28, 1899.

2 SHEETS-SHEET l.

PATENTED MAY 26, 1903.

E. PRINTZ. LEATHER STAKING MACHINE. APPLICATION-FILED SEPT. 28, 1899.

2 SHEETS-SHEET 2.

N0 MODEL.

UNITED STATES Patented May 26, 1903.

EMANUEL PRINTZ, OF PHILADELPHIA, PENNSYLVANIA.

LEATHER-STAKlNG MACHINE.

sPncI'rIcA'rI-onr forming art of Letters Patent No. 729,412, dated May 26, 1903. Application filed September 28, 1899. Serial No. 731.899. (No model) To all whom/it may concern.-

Be it known that I, EMANUEL PRINTZ,a citizen of the United States, residing in the city and county of Philadelphia, State of Pennsylvania, have invented anew an d useful Improvement in Leather-Staking Machines, which improvement is fully set forth in the following specification and. accompanying drawings. 7

My invention consists of an improved construction of a leather-staking machine,wherein I employ an upper jaw having 'a springpressed head pivotally attached thereto, said head carrying a roller thereon, which is capable of being adjusted upwardly and downwardly according to requirements.

It also consists of leather-staking jaws,each of which carries cushioned staking devices.

It also consists of a novel construction of knife-carrier, which is pivotally attached to the lower jaw and supports a plurality of knives, the distance between which latter can be increased or diminished according to requirements, one of said knives being capable of vertical adjustment and means being provided for rocking said knife-carrier at proper intervals.

It further consists of novel means for imparting at the proper intervals a curvilinear movement to the parts constituting the upper and lowerjaws.

It also consists of novel means for adjusting the length of the connecting-rod and its' adjuncts.

It also consists of a novel manner of impartinga simultaneous downward and backward movement to the upper staking-jaw, said downward-movement causing the proper represents a rear elevation of Fig. 4. Fig. (5 represents, on an enlarged scale, a section on line y 9, Fig. 2.

Similar characters of reference indicate cor responding parts in the figures.

Referring to the drawings, a designates a main shaft mounted in the bearings 13 and carrying the pulleys c, which may be tight and loose,as is customary,and transmit power to the piniond, which meshes with the gear e,carried by the shaftfiupon which is mounted the wheel g, which carries the crank or wrist-pin h, which has its bearing in the box 7', which is engaged by the threaded stem or bolt k, which passes through the adjacent end Z of the connecting-rod m,said bolt being held in position by the nuts or their equivalents n, whereby the box j can be adjustable according to requirements. The connecting- -rod m is pivotally attached at o to the lower extremity of the upright arms 19, which has secured thereto the lateral arm q, said arms forming the'upper jaw r,which has the head 8 pivoted thereto, the upper portion of said head having one end of a spring t secured thereto, while the free end of said spring rests on the arm q, the extent of movement of said head being limited by, the stop or pin u, carried thereby and which contacts with a suitable portion of said arm (1.

The flanges 00' of the head 5 have mounted in the ends thereof. the threaded stems o, in which isjournaled the rollerw, said stems being-adjustable in said flanges and held in the desired position by the nuts or equivalent fastening devices y. .-The arms p are pivoted at a to the main post l, to which is secured .by suitable fastening devices 2 the plates 3,

which have the trnnnions 5 projecting therefrom, which rock or'oscillate in the bushings or bearings"6,= which are mounted in the frames7, the upper portion of which sup slightly inclined and having slots 15 therein, through which pass the bolts or fastening devices 16, whereby said knife is capable of being adjusted in an upright direction upon the carrier 13 and with relation to the knife 17.

17 designates the forward knife, which in the present instance has its upper end 18 slightly curved inwardly or toward the knife 14, said knife being mounted on the plate 19, through which passes the serew-bolts or similar devices 20, the threaded ends of which engage the body portion 13, wherebythe knife 17 is adjustable laterally or toward or away from said body portion and is held in the desired adjusted position by means of the nuts 21. Theknife 17 is further held in the desired position by the pins 22, which engage seats 23 in the body 13. The lower portion of the plate 19 or the extension 24 attached thereto has the roller 25 in contact therewith, said roller being carried by the arm 26, which is attached to the plate 27, which is movably mounted on the pin 28, which may be supported in any suitable manner, said plate having eccentrically attached thereto one end of the rod 29, the other end thereof being eccentrically attached to the cam 30, which is pivot-ally mounted on the pin 31, carried by the main post 1, said cam having the projection 32, which is adapted to be engaged by the finger 33, attached to a suitable portion of the arm 1).

31 designates a spring having one end attached to a stationary part, such as 11, and its other end secured to the part 24 or an extension 35 thereof, whereby the roller 25 will always be held in contact with the contiguous plate or extension.

313 designates guide-rollers which are adapted to travel on the segmental-shaped tracks 37 and are suitably secured to the upper portion of the main post 1.

The operation is as follows: Referring first to Fig. 2, it will be apparent thatif power he applied to the shaft a so as to rotate the parts in the direction indicated by the arrows the upper jaw 1', which is formed by the arms (1 and will be caused to rock on the pivotal connection, whereby the roller 10 will first approach the knives l4 and 17. The continued movement of the connecting-rod min the direction indicated by its arrow will cause the finger to engage the portion 32 of the cam 30, as indicated in dotted lines, and by following out the connections intermediate said cam and roller 25 it will be apparent that after said portion 32 moves in the direction of the arrow leading therefrom in Fig. 2 said roller will cause the part 24 to move outwardly, thereby actuating the knife-carrier, and the knives l7 and 14 will rock rear-wardly, and if a skin is now introduced between the staking devices, consisting of the roller 20 and the knives 17 and 14c, in the usual manner it fectively staked or treated to the desired extent. When the roller and knives reach their rearward position through the medium of the operating mechanism, the staking devices will separate and move forwardly in this position, during which period the operator can shift the skin so as to present a new surface thereof to be staked. To increase or decrease the pressure to which the leather is subjected by the action of the machine, the knife 17 can be adjusted laterally or toward or away from the knife-carrier, whereby said knife can be shifted to the desired extent toward the roller w, the upper bolt 20 serving to retain said knife 17 in the desired position, the distance between said knife and the knife 14 being increased or diminished according to requirements.

It is evident that the nearer the knife 17 is to the roller the greater will be the pressure, and vice versa. By the movement of the spring t, which presses against and slides upon the arm q, an automatic adjustment is permitted to said roller, which is very desirable whenever the condition of the leather should furnish an obstacle to the easy passage thereof through the staking devices, since said roller in my invention will jump over said obstacle instead of pulling the leather out of the operators hands and will also prevent tearingand cracking of the same, anyimproper movement of the head .9 being prevented by the pin a.

It will thus be seen from the foregoing that the roller 11; will be moved toward the knife 17 until the horizontal center line of said roller stands on substantially a level with the top edge of said knife, and at the same time the roller will be moved to the rear, and said knife will also move in the same direction, so that its edges touch the roller somewhat above the horizontal center line.

It will further be apparent that the staking devices above mentioned will be actuated while in contact with each other in the path of an arc baekwardly and will be separated from their contact at the end of their motion, said staking devices then returning to their original position. The roller 10 is consequently driven in a circular direction around the pivotal connection ,2, and at the proper interval the desired motion is imparted to the knife-carrier 12, while the main post 1 is caused simultaneously to rock in the desired arc-shaped path around the trunnions 5 as an axis.

It will thus be seen that when that portion of the arm 1) which extends below the fulcrum has been pulled so far that the horizontal center line of the roller 10 stands on a level with the top edge of the knife 17 the proper movement will be imparted to the cam 30 touches the roller w above its center line, where it is kept until the end of the working stroke is reached, at which period the connecting-rod 29 is released and the spring 34 returns the knife 17 to its original position. I also desire to call attention to the manner of supporting the main post 1, which will be understood from Fig. 6, whereby friction is reduced to a minimum and the operation is rendered very effective.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-- 1. In a leather-staking machine, an upper and lowerjaw, an adjustable resilient or cushioned staking device carried by each of said jaws, a stop for limiting the movement of the staking device carried by the upper jaw and means for operating said jaws.

2. In a leather-staking machine, an upper and lower jaw, means for actuating the same, said upper jaw having a spring-pressed head pivotally attached thereto, a stop for said head and a roller carried by said head.

3. In a leather-staking machine, the combination of upper and lower jaws, means for actuating the same, a spring-pressed head supported on the upper jaw, a roller carried by said head, a stop for said head and means for adjusting said roller upon said head.

4. In a leather-stakin g machine, upper and lower jaws, means for actuating said jaws, a head pivotally supported upon said upper jaw, a spring attached to said head, and having its free end bearing on said jaw, a pin for preventing improper movement of said head, and a roller supported on adjustable devices engaging said head.

5. In a leather-staking machine, a plurality of jaws, a staking device carried by the upper jaw, means for adjusting said staking device upon said upper jaw and for securing the same in its adjusted position, a knife-carrier pivotally supported on the lower jaw, knives adj ustably secured to said carrier, one of said knives being laterally adjustable on said carrier, the other of said knives being adjustable in an upright direction on said carrier, and means for rocking the latter.

0. In a leather-staking machine, a knifecarrier pivotally supported, knives carried thereby, means for-moving one of said knives laterally for increasing or diminishing the distance between said knives, and means for raising and lowering the other of said knives relative to said carrier and to the laterallymovable knife.

7. In a leatherstaking machine, a main post fulcrumed at its lower portion, an upper jaw fulcrumed to said main post, the lower portion of said upper jaw having a connecting-rod attached thereto,,a lower jaw attached to said main post, a knife-carrier pivotally attached to said lower jaw, knives mounted on said carrier, and staking devices carried by said upper jaw.

8. In aleather-staking machine, aplurality of jaws, a main post, an upper jaw pivotally attached to said main post, a connecting-rod for actuating said upper jaw, acam mounted on said main post, a finger carried by said upper jaw for engaging said cam, a knife-carrier pivoted to said lower jaw and connected with said cam to be rocked thereby, and staking devices carried by said upper jaw.

'9. In a leather-staking machine, a main post, having trunnions projecting outwardly in suitable bearings, an upper jaw pivotally mounted in said post, a connecting-rod for rocking said post and jaw, a cam pivoted to said post, a finger attached to the lower portion of said jaw and adapted to engage said cam, a lower jaw attached to said post, a knife-carrier movably mounted in said lower jaw, and connections from said cam to said knife-carrier.

10. In a leather-staking machine, upper and lower jaws, adjustable staking devices carried by said upper jaw, a knife-carrier pivoted to said lower jaw and provided with knives, tension devices for said knife-carrier, means for adjusting one of said knives in an upright direction and means for adjusting the other of said knives laterally on said carrier, and means for actuating said jaws.

11 In a leather-staking machine, a main post fulcrumed at its lower portion, an upper jaw pivoted to said post, means for simultaneously imparting independent movements to said post and jaw, a lower jaw attached to said post, means for actuating said jaws, and staking devices carried by the latter.

12. In aleather-stakin g machine,upper and lower jaws, a connecting-rod for actuating said jaws, means for operating said connecting-rod, and means for adjusting the throw of said connecting-rod.

13. In a leather-staking machine, a main post, staking devices carried thereby, a connecting-rod for actuating said main post, an arc-shaped frame and guide-rollers adapted to rock in unison with said post and connecting-rod and to travel on said frame.

14. In a leather-staking machine, the combination of an arc-shaped frame, a main post adapted to rock therein, staking devices supported by said main post, a connecting-rod for actuating said post and devices, and rollers adapted to move in unison with said connecting-rod and main post and to travel on said frame, said staking devices operating in unison with said main post.

15. In a leather-staking machine, a main post, staking devices carried thereby, means for actuating said main post, aframe having a track thereon, and guide-rollers carried by said post, and adapted to travel on said track.

EMANUEL PRINTZ. 

